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Cocoanut Palm Leaf Roller (Omiodes blachhurni). 



The adult of this caterpillar is not much observed or known 

 by the general public, nor are the inconspicuous egg masses often 

 seen, but the caterpillar or leaf roller is the individual who does 

 attract attention when the beautiful new palm leaves begin to look 

 ragged with streaks of brown. Generally speaking, although the 

 insect is constantly present, attacking the cocoanut and native 

 palms, very little complaint has been made until this year. Young 

 cocoanut plantings on Oahu as well as Kauai suffered very severely 

 and much inquiry fell into our hands. The pest usually is kept in 

 check by the several parasites attacking the eggs, larvae and 

 pupae, and the serious attack this year c^n probably be accounted 

 for by unfavorable weather conditions for the rapid increase of 

 the parasites. In two localities, one on Oahu and one on Kauai, 

 groves which are partly piotected by good windbreaks show a 

 decided difference where the palms are in the lee of the windbreak 

 over the palms which get the full benefit of strong w^nds. It is 

 natural to expect some such difference so far as the minute para- 

 sites are concerned, for they must have quite a struggle to spread 

 from palm to palm, where strong winds have been existing for 

 any length of time. Some of the growers are going to plant more 

 windbreaks as they can readily see the difference in their own 

 groves. 



Alligator Pear Barl: Beetle (Xylehorus immaturus). 



Much complaint has reached this Division of the damage 

 done to the limbs and trunks of the alligator pear tree. The dam- 

 age generally has quite progressed before it is noticed. The pest, 

 which is a very minute black oblong beetle, bores into the dying 

 bark, deposits its eggs, and the larvae work under the bark and 

 into the wood. When the insects are quite abundant they very 

 often will attack even good healthy trees. The presence of the 

 pest is generally noticed by a white powdery substance appearing 

 on the limbs and trunk of the trees. If the trees show a few of 

 the weaker or unhealthy limbs attacked, they should be removed 

 as soon as possible and all affected spots should be cut out and a 

 coating made of lime and crude oil applied. To prepare this crude 

 oil whitewash, place twenty-five pounds of unslaked lime in a tub 

 and put just enough water on to start it slaking, and when well 

 started pour into it gradually one and a half gallons of crude 

 oil. After the lime and oil have mixed well more water can be 

 added if necessary; it should be well stirred and should have the 

 consistency of thick cream. This when applied is a good repellant 

 and also forms a very good coating for the affected parts. 

 Tree Roach (Eleutheroda dytiscoides). 



Another pest Avhich is causing much annoyance, especially to 



